Air-brake coupling



I 1,641,919 sePt- 6 1927'. N. A. CHRIS-MENSEN 4AIR BRAKE coUPLING Filedsept. 28, 1925 v INI 'EN TOR. @a 2.451% BY `Patented Sept. 6, 1927.

' UNITED STATES NInLs a. camara-Nenn, or

.AIB-BRAKE Application led September 278, 1925. Serial lle. 59,117.

r'lhe invention relates to "air brake coup in One object of theinvention is to provide a coupling for air hose in which a pair of pipesare simultaneously coupled together.

A further object of the invention is to provide a coupling for air hosein which a pair of pipes are simultaneously l coupled4 together and eachof the coupling mem rsI is provided with an automatic shut-off valve.for one of the, pipe conduits, which valves are automatically openedvwhen the couplings are hookedsogether.

The (invention further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings Fig. 1 is a vertical sectional view through avdeviceembodying the invention before the parts are fully coupled bination ofa. pair of interlockable coupling' together.

Fig. 2 is a bottom plan viewthereof; 'Fig'. 3 is a side e evation viewthereof before the parts are fully coupled to ther.

The coupling consists of two comp ementary interlockable couplingmembers 4 with the usual calm rejections 5 and 6 of one interlocking witthe projections 6 and 5 of the other. Each of these members havecommunicating passages 7and 8 with a shutfoii'- valve 9 between saidpassages, and a passage 10 communicatin with an annular `space 11. Apipe 12 is coup ed to each of the members 4 by a coupling 13communicating with the passage 7, and a pipe 14 is also coupled to eachmember by a coupling 15 ci'immunicating with the .passage 10. y

Each valve 9 is urged to its seat 16 by a 4spring 17 mounted in thetubular stem 18 of the valve and in the bore 19 of a boxnut 20. Eachvalve 9 has'an extension in 21engageable with a similar pin on the ot ervalveto hold both valves open when the' cou- A p ling members 4 arehooked together. The

annular sp'ace 11 and a central assa'ge 22 alined with the passages 8are ormedby abutting complementary' channel --shaped "l so pling member'and having threaded engageflexible packing rings 23 each held to itsvcoupling member by a channel-shaped metal 4ring 24 and bolts 25.mountedin each coument with the web portion of each ring 24.

` :.With this eonstruction,'when the 4 are coupled together the` pipes12 will communicate with'each other through the passages 7 8 and 22, thevalves 9 being then open, and the pipes 14 will. communicate with eachother through the assages 10 `and the space 11. When the coup ingmembers 4 aredisengaged the valves 9 close ofi the ends ofxthe pipes 12by closingofic' the passage 7. In my application Serial No. 47,506,filed August 1st, 1925, the pipes 12, with the coumembers, each having apair of assages formed therein, an annular charme -shaped coupling ringsecured to each coupling and adapted to contact with the ring of theother coupling when said members are joined together vto formv anannular space 'and' a central passage, one set .of passages of saidcoupling members communicating with the annular space formed by` saidrings and the other set of passages communicating with the centralpassage formed uby said rings.

2. In an air brake pipe coupling, the combination ofka pair ofinterlockable coupling members. each having a pair of passages formedtherein, an annular, channe shaped flexible coupling ring, an annularchannlshaped ring fitting within thechannel of said`flexible couplingring and bolts securing said coupling ring-to its cou ling member, saidcoupling ringsladapte to engage each other`to form an annular space anda central passage when said coupling members are joined together, onesetwof passages of said coupling members communicating with said annularspace and the other set-of passages commumcatingwith said central pas`sage.

y3. In an air brake binationof a pair of interloc able coupling members,each having a lpair of assages formed therein and valve seat form' pipecou ling', the coin-y in saidv members in one `set ofpassages, anannular.

channel-shaped coupling ring secured to each coupling member and adaptedto engage the` ring of theoother member to forman annular spacecommunicatin with one set of pas- Sages and a centraspace communicatingwith another set o f assaes in said members, andspring-closed s ut-ovalves engageable with said seats in the passages communieating withsaicentral space, having stems projecting into said central space anden- 10 gageable with each other to open said valves when the couplingmembers are joined to- NIELS A. GHRISTENSEN.

